Z was all over the place....nice, neat, well organized letters & ciphers, sloppy letters with very bad penmanship, artistic, and stylish letters.If he was the Riverside writer, having one set of handwritten letters, and a typed letter, may not be out of the ordinary.
I think the Riverside letter/desk writer, and Zodiac, are all one and the same, and any changes in writing style,or subject matter, is a sign he evolved in some way. I also think that typing the letter was a way to hide his writing and keep himself from being identified, but later, he felt more brazen and wrote the Bates letters but obviously tried to hide his true writing.
I am curious about opinions on one thing, if the confession letter writer took the time to type out a letter, why did he not type out the envelope? Anybody have any theories?


